1. A substance that undergoes a physical change is ________ the original substance after the change. *
1 point
a clone of
the same as
different from
slightly larger than
2. Which of the following is NOT an example of a physical change? *
1 point
sour milk
crumpled paper
pencil sharpening
shrunken clothing
Other:
3. A ___________ change alters the form or appearance of matter but does not change the substance's identity. *
1 point
climate
physical
chemical
substantial
4. What kind of properties can only be observed when a substance changes into a different substance? *
1 point
real properties
liquid properties
chemical properties
physical properties
5. Which of the following is a physical property? *
1 point
Toxicity
Reactivity
Malleability
Flammability
6. Mrs. Corona asked her science class what would happen if a substance were to undergo a chemical change. The students said that a new substance would be formed. Which of the following would NOT provide evidence that supports the students’ claim? *
1 point
change in size and shape
presence of bubbles
change in color
change in odor
7. Which of the following shows an evidence of chemical change? *
1 point
heat formed
color change
bubbles formed
all of the above
8. Alex baked a batch of cookies. When the cookies came out of the oven, Alex noticed that color of the cookies had changed. They smelled different than the raw cookie dough. The raw cookie dough was sticky and soft and the baked cookies are dry and firm. What kind of change has taken place in the cookies? *
1 point
Physical change- cooking
Physical change- breaking
Chemical change- decaying
Chemical change- cooking
9. Oliver is roasting marshmallow over a campfire. His marshmallow falls into the fire and burns. Which is true about his marshmallow? *
1 point
The marshmallow turns into new matter (ashes).
The fire produces no change to the marshmallow.
The fire produces a physical change to the marshmallow.
The ashes left behind will turn back into a marshmallow.
10. What does it mean when there is a physical change? *
1 point
Matter has changed from one substance into another
A new substance has been formed
Matter has changed size, shape or form
Matter has changed on the molecular level
11. Which of the following is NOT a physical change? *
1 point
grating cheese
melting cheese
fermenting of cheese
mixing two cheeses in a bowl
12. Which of these is a result of a chemical change? *
1 point
a mixture
a solution
a new substance
melting or freezing
13. What type of change occurs at the molecular level? *
1 point
chemical change
physical change
temperature change
all of the above
14. Which statement is true about chemical changes? *
1 point
Chemical changes are not observable.
Chemical changes always produce new substances.
Physical and chemical changes can happen at the same time.
Physical changes can change both physical and chemical properties.
15. Chewing food to break it down into smaller particles represents a _________ change, but the changing of starch into sugars by enzymes in the digestive system represents a ___________change? *
1 point
Physical-physical
physical-chemical
chemical-physical
chemical-chemical